Hydrostatic weir shutter



YMarch 23, 1937. F. JERM HYDROSTATIC wEIR SHUTTER Filed July 22, 1935 Patented Mar. 23, 1937 UNITED STATES PATENT OFFICE Application' July 22, 1935, Serial No. 32,540 In Czechoslovakia May 20, 1935 3 Claims. (Cl. (i1- 27) The object of the present invention is to obtain a readily operated weir shutter of contracted and simplified form, and the invention consists in the provision of a pair of leaves hinged respectively to the high and low water sides of a substructure, the leaf at the low Water side being provided at its free end with a cylinder and with an arcuate shield arranged tangentially to the cylinder and concentrically with the leaf hinge as a support for the free end of the leaf hinged to the highwater side.

A special feature of the invention is the provision, on the shore structure of the Weir, of abutments which determine the fully raised posil5 tion of the weir by engagement with the cylinder.

Fig. 1 of the accompanying drawing represents a sectional view of the weir according to one construction, and

Fig. 2 is a sectional View of a modified form.

The weir comprises two leaves I and 2 which are hinged at 5 and 6 respectively to a substructure at opposite sides of a well into which the leaves are adapted to recede when the Weir is completely lowered. The leaf 2 at the low water side of the weir carries at its free end a cylinder 3 to which a shield 4 is connected. This shield occupies a tangential position on the cylinder and is curved concentrically with the hinge I5. The leaf I is preferably also curved and bears with its free end against the shield 4. On the weir being lowered, the leaf I rst slides on the shield 4 and finally comes to rest across the cylinder 3. The completely lowered position of the weir is shown by dotted lines in Fig. l, I', 2',

3', and 4' being the dilferent movable elements of the weir.

It will be seen that the distance between the hinges 5 and 6 is less than twice the distance h from the high water level to the sill of the weir,

so that a very contracted form of weir will be obtained.

The shore structure 9 of the Weir is provided with projections 8 against which the cylinder 3 can abut in the fully raised position of the weir.

These projections thus determine the fully raised position of the Weir, so that interengaging stops on the leaves, usually employed for this purpose, can be obviated.

The Weir is raised in the usual manner by letting the high water into the space I underneath the leaves, and it is lowered by discharging water from the space 'I to the low water side.

Since the pressure of the high water is always directed by means of the arcuate shield 4 towards the hinge the weir will be very sensitive.

The sensitiveness of the weir will be further promoted by the arrangement shown in Fig. 2 5 wherein the arcuate leaf Ia at the high water side is provided at its free end with anti-friction rollers II and wherein a second shield I l) is carried tangentially from the cylinder in opposite direction to the shield 4 asa race-way 10 for the leaf Ia in the lower positions of the Weir. By this arrangement the leverage of the leaf 2 during the initial raising of the Weir will be considerably augmented.

The dotted lines again indicate the positions 15 la, II', I0', 2 of the movable elements in fully lowered position.

For carrying out repairs, the cylinder 3 can be suspended from the shore structure in a suitable position, and the space 'I can then be emptied to 20 give access to the weir while' the latter remains in working condition. The suspension chains used for this purpose can be Very light, since the pressure of the head water on the leaves is taken up by the hinge 6 and since only part of the weight of the elements 2, 3, 4, and maybe Ill, will have to be supported by the chains.

I claim:

1. A hydrostatic Weir shutter comprising a sub- 30 structure having a well, a leaf hinged horizontally to the substructure at the low water side of the well, a cylinder carried at the free end of the leaf and radially aligned therewith, an arcuate shield projecting from the cylinder through an 35 extent greater than the diameter thereof and facing the high water, said shield being tangential to the cylinder and concentric with the hinge, and a second leaf hinged horizontally to the substructure at the high water side of the 40 Well and adapted to slide with its free end on the shield -across the cylinder.

2. A Weir shutter as claimed in claim 1 in combination with a second tangential shield carried by the cylinder and carried in opposite direction 45 to said rst mentioned shield as an additional raceway for the second leaf.

3. A weir structure as claimed in claim l in combination with anti-friction rollers applied to the free end of the second leaf for engagement 50 with the shield.

FRANTISEK JERM. 

